28078208 has 16 divisors (see below), whose sum is σ = 55937310. Its totient is φ = 14039040.

The previous prime is 28078189. The next prime is 28078229. The reversal of 28078208 is 80287082.

It can be written as a sum of positive squares in only one way, i.e., 17372224 + 10705984 = 4168^2 + 3272^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109553 + ... + 109808.

Almost surely, 2^28078208 is an apocalyptic number.

It is an amenable number.

28078208 is a deficient number, since it is larger than the sum of its proper divisors (27859102).

28078208 is an equidigital number, since it uses as much as digits as its factorization.

28078208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219375 (or 219363 counting only the distinct ones).

The product of its (nonzero) digits is 14336, while the sum is 35.

The square root of 28078208 is about 5298.8874303952. The cubic root of 28078208 is about 303.9413552619.

The spelling of 28078208 in words is "twenty-eight million, seventy-eight thousand, two hundred eight".